| /* |
| * Copyright (c) 2016, 2019 Eike Stepper (Loehne, Germany) and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * Eike Stepper - initial API and implementation |
| */ |
| package org.eclipse.net4j.util.collection; |
| |
| /** |
| * @author Eike Stepper |
| * @since 3.7 |
| */ |
| public abstract class AbstractCloseableIterator<E> extends AbstractIterator<E> implements CloseableIterator<E> |
| { |
| public AbstractCloseableIterator() |
| { |
| } |
| |
| @Override |
| protected abstract Object computeNextElement(); |
| |
| @Override |
| public abstract void close(); |
| |
| @Override |
| public abstract boolean isClosed(); |
| |
| @SuppressWarnings("unchecked") |
| public static <T> CloseableIterator<T> emptyCloseable() |
| { |
| return (CloseableIterator<T>)EmptyIterator.INSTANCE; |
| } |
| } |